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4f38c4bfd8
This is definitively a bug to call quic_tx_packet_refdec() to decrement the reference counter of a TX packet calling quic_tx_packet_refdec(), and possibly to release its memory when it is negative or null. This counter is incremented when a TX frm is attached to it with some allocated memory and when the packet is inserted into a data structure, if needed (list or tree). Should be easily backported as far as 2.6 to ease any further backport around this code part.
102 lines
3.6 KiB
C
102 lines
3.6 KiB
C
/*
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* QUIC protocol definitions (TX side).
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*
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* Copyright (C) 2023
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _HAPROXY_QUIC_TX_H
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#define _HAPROXY_QUIC_TX_H
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#include <haproxy/buf-t.h>
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#include <haproxy/list-t.h>
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#include <haproxy/quic_conn-t.h>
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#include <haproxy/quic_tls-t.h>
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#include <haproxy/quic_pacing-t.h>
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#include <haproxy/quic_rx-t.h>
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#include <haproxy/quic_tx-t.h>
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struct buffer *qc_txb_alloc(struct quic_conn *qc);
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void qc_txb_release(struct quic_conn *qc);
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int qc_purge_txbuf(struct quic_conn *qc, struct buffer *buf);
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struct buffer *qc_get_txb(struct quic_conn *qc);
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enum quic_tx_err qc_send_mux(struct quic_conn *qc, struct list *frms,
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struct quic_pacer *pacer);
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void qel_register_send(struct list *send_list, struct quic_enc_level *qel,
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struct list *frms);
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int qel_need_sending(struct quic_enc_level *qel, struct quic_conn *qc);
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int qc_send(struct quic_conn *qc, int old_data, struct list *send_list,
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int max_dgrams);
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int qc_dgrams_retransmit(struct quic_conn *qc);
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void qc_prep_hdshk_fast_retrans(struct quic_conn *qc,
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struct list *ifrms, struct list *hfrms);
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int send_retry(int fd, struct sockaddr_storage *addr,
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struct quic_rx_packet *pkt, const struct quic_version *qv);
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int send_stateless_reset(struct listener *l, struct sockaddr_storage *dstaddr,
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struct quic_rx_packet *rxpkt);
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int send_version_negotiation(int fd, struct sockaddr_storage *addr,
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struct quic_rx_packet *pkt);
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/* The TX packets sent in the same datagram are linked to each others in
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* the order they are built. This function detach a packet from its successor
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* and predecessor in the same datagram.
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*/
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static inline void quic_tx_packet_dgram_detach(struct quic_tx_packet *pkt)
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{
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if (pkt->prev)
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pkt->prev->next = pkt->next;
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if (pkt->next)
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pkt->next->prev = pkt->prev;
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pkt->prev = pkt->next = NULL;
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}
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/* Increment the reference counter of <pkt> */
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static inline void quic_tx_packet_refinc(struct quic_tx_packet *pkt)
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{
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pkt->refcnt++;
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}
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/* Decrement the reference counter of <pkt> */
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static inline void quic_tx_packet_refdec(struct quic_tx_packet *pkt)
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{
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BUG_ON(pkt->refcnt <= 0);
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if (--pkt->refcnt == 0) {
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BUG_ON(!LIST_ISEMPTY(&pkt->frms));
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/* If there are others packet in the same datagram <pkt> is attached to,
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* detach the previous one and the next one from <pkt>.
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*/
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quic_tx_packet_dgram_detach(pkt);
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pool_free(pool_head_quic_tx_packet, pkt);
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}
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}
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/* Return the number of bytes which may be sent from <qc> connection when
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* it has not already been validated. Note that this is the responsibility
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* of the caller to check that the case with quic_peer_validated_addr().
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* This latter BUG_ON() if 3 * qc->rx.bytes < qc->tx.prep_bytes.
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*/
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static inline size_t quic_may_send_bytes(struct quic_conn *qc)
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{
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return 3 * qc->bytes.rx - qc->bytes.prep;
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}
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#endif /* _HAPROXY_QUIC_TX_H */
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